Update: compress/hard constrained token usage (#136)

* setup truncation & folder structure

* fix: xml in prompt; qwen code in stats page

* fix: clear & continue logic

* preflight

* add maxSessionLimit in README

packages/cli/src/ui/components/HistoryItemDisplay.test.tsx

@@ -63,7 +63,7 @@ describe('<HistoryItemDisplay />', () => {
     const { lastFrame } = render(
       <HistoryItemDisplay {...baseItem} item={item} />,
     );
-    expect(lastFrame()).toContain('About Gemini CLI');
+    expect(lastFrame()).toContain('About Qwen Code');
   });
 
   it('renders ModelStatsDisplay for "model_stats" type', () => {